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https://www.readbyqxmd.com/read/28195979/effects-of-high-intensity-interval-training-with-different-interval-durations-on-physical-performance-in-handball-players
#1
Jorge Viaño-Santasmarinas, Ezequiel Rey, Sergio Carballeira, Alexis Padrón-Cabo
The purpose of this study was to compare the effects of 2 high-intensity interval training protocols (HIIT) with different interval durations (short (SI) vs long (LI)), based on peak running velocity in 30-15 Intermittent Fitness Test (VIFT) in handball players. Eighteen highly trained players (age: 22.7±3.9 years; height: 181.5±6.6 cm; body mass: 84.7±14.1 kg) were randomly assigned to SI (2 sets of 22 intervals of 10-s runs at 95%VIFT) or LI (5 sets of 3 min intervals at 85% VIFT) group. The intervention program had to be carried out 2 times a week over 6 weeks...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28193312/leukocyte-and-skeletal-muscle-telomere-length-and-body-composition-in-monozygotic-twin-pairs-discordant-for-long-term-hormone-replacement-therapy
#2
Elina Sillanpää, Paula Niskala, Eija K Laakkonen, Elodie Ponsot, Markku Alén, Jaakko Kaprio, Fawzi Kadi, Vuokko Kovanen, Sarianna Sipilä
Estrogen-based hormone replacement therapy (HRT) may be associated with deceleration of cellular aging. We investigated whether long-term HRT has effects on leukocyte (LTL) or mean and minimum skeletal muscle telomere length (SMTL) in a design that controls for genotype and childhood environment. Associations between telomeres, body composition, and physical performance were also examined. Eleven monozygotic twin pairs (age 57.6 ± 1.8 years) discordant for HRT were studied. Mean duration of HRT use was 7.3 ± 3...
February 14, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28192512/explosive-strength-and-endurance-adaptations-in-young-elite-soccer-players-during-two-soccer-seasons
#3
Riccardo Di Giminiani, Christiano Visca
The purpose of the present study was to investigate the explosive strength and endurance adaptations in young elite soccer players who underwent a supervised training program for a period of two years. Nineteen players, with seven years of training experience (age: 13.3 ± 0.1 years; body weight: 57.9 ± 4.9 kg; height: 168.9 ± 4.7 cm; BMI: 20.1 ± 1.1 kg/m2), voluntarily participated in the present study. The testing sessions were performed at the beginning of the preparation period in the first (T1), second (T2), and third year (T3)...
2017: PloS One
https://www.readbyqxmd.com/read/28187195/a-multilevel-analysis-of-health-related-physical-fitness-the-portuguese-sibling-study-on-growth-fitness-lifestyle-and-health
#4
Sara Pereira, Peter Todd Katzmarzyk, Thayse Natacha Gomes, Michele Souza, Raquel Nichele Chaves, Fernanda Karina Dos Santos, Daniel Santos, Donald Hedeker, José Maia
This study investigates biological, behavioural and sociodemographic correlates of intra-pair similarities, and estimates sibling resemblance in health-related physical fitness (PF). The sample comprises 1101 biological siblings (525 females) aged 9-20 years. PF components and markers were: morphological [waist circumference (WC) and %body fat (%BF)], muscular [handgrip strength (GS) and standing long jump (SLJ)], motor [50-yard dash (50YD) and shuttle run (SR)], and cardiorespiratory (1-mile run). Biological maturation was assessed; physical activity (PA), TV viewing and socioeconomic status (SES) information was obtained...
2017: PloS One
https://www.readbyqxmd.com/read/28182510/the-effect-of-plyometric-training-volume-in-prepubertal-male-soccer-players-athletic-performance
#5
Helmi Chaabene, Yassine Negra
PURPOSE: The aim of this study was to assess and to compare the effects of 8-weeks in-season (2 sessions per-week) low and high-volume plyometric training (PT) on measures of physical fitness in prepubertal male soccer players. METHODS: A total of twenty-five soccer players were randomly assigned to low-volume plyometric training group (LPT; n=13; age = 12.68 ± 0.23 years; age at peak height velocity (APHV) = 14.25 ± 0.29 years, maturity-offset = -1.57 ± 0.29 years) and high-volume plyometric training group (HPT; n=12; age = 12...
February 9, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28181775/precision-of-verbal-feedback-affects-accuracy-of-motor-skill-performance
#6
Mirosław Zalech, Zbigniew Bujak
BACKGROUND: The study sought to determine whether the precision of verbal feedback on knowledge of results affected the accuracy of motor skill performance with various parameters. METHODS: Eighty-eight male young healthy adults (21.55±1.13 years) participated in the study. They were randomly assigned to two groups (44 people each one). They had to perform standing long jump test. Three types of feedback and three distances that the participants jumped were used in the experiment...
February 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28176405/deficits-in-anthropometric-indices-of-nutritional-status-and-motor-performance-among-low-birth-weight-children-from-maputo-city-mozambique
#7
Mario Eugénio Tchamo, Marcos André Moura-Dos-Santos, Fernanda Karina Dos Santos, António Prista, Carol Góis Leandro
OBJECTIVE: To evaluate associations between low birth weight (LBW) and anthropometry, body composition, physical fitness, and gross motor coordination among schoolchildren from Maputo, Mozambique. METHODS: A total of 353 children aged 7 to 10 years old from both genders born in Maputo (Mozambique) were sampled. The sample was divided into two groups: LBW (n = 155) and normal birth weight (NBW, n = 198). Body composition measurements and indices weight-for-age, height-for-age, and weight-for-height were assessed...
February 8, 2017: American Journal of Human Biology: the Official Journal of the Human Biology Council
https://www.readbyqxmd.com/read/28171810/short-versus-long-small-sided-game-training-during-ramadan-in-soccer-players
#8
Hana Baklouti, Noureddine Rejeb, Asma Aloui, Hamdi Jaafar, Achraf Ammar, Hamdi Chtourou, Olivier Girard, Nizar Souissi
OBJECTIVE: To compare the effects of two small-sided game (SSG) training formats (4 × 4 min (SSG-S) and 2 × 8 min (SSG-L)) conducted during Ramadan on Hoff and five-jump (5JT) tests' performances and session rating of perceived exertion (sRPE). DESIGN: Three group, case-control. SETTING: Field tests. PARTICIPANTS: Twenty-four male soccer players were divided into 3 groups: 2 groups undertaking 4 weeks of SSG-S (n = 8) or SSG-L (n = 8) during Ramadan and a control group (n = 8)...
October 24, 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28165360/body-composition-nutritional-profile-and-muscular-fitness-affect-bone-health-in-a-sample-of-schoolchildren-from-colombia-the-fuprecol-study
#9
Mónica Adriana Forero-Bogotá, Mónica Liliana Ojeda-Pardo, Antonio García-Hermoso, Jorge Enrique Correa-Bautista, Emilio González-Jiménez, Jacqueline Schmidt-RíoValle, Carmen Flores Navarro-Pérez, Luis Gracia-Marco, Dimitris Vlachopoulos, Javier Martínez-Torres, Robinson Ramírez-Vélez
The objective of the present study is to investigate the relationships between body composition, nutritional profile, muscular fitness (MF) and bone health in a sample of children and adolescents from Colombia. Participants included 1118 children and adolescents (54.6% girls). Calcaneal broadband ultrasound attenuation (c-BUA) was obtained as a marker of bone health. Body composition (fat mass and lean mass) was assessed using bioelectrical impedance analysis. Furthermore height, weight, waist circumference and Tanner stage were measured and body mass index (BMI) was calculated...
February 3, 2017: Nutrients
https://www.readbyqxmd.com/read/28165082/microscopic-nucleation-and-propagation-rates-of-an-alanine-based-%C3%AE-helix
#10
Chun-Wei Lin, Feng Gai
An infrared temperature-jump (T-jump) study by Huang et al. (Proc. Natl. Acad. Sci. U. S. A., 2002, 99, 2788-2793) showed that the conformational relaxation kinetics of an alanine-based α-helical peptide depend not only on the final temperature (Tf) but also on the initial temperature (Ti) when Tf is fixed. Their finding indicates that the folding free energy landscape of this peptide is non-two-state like, allowing for the population of conformational ensembles with different helical lengths and relaxation times in the temperature range of the experiment...
February 15, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28161198/the-relationship-between-socioeconomic-status-family-income-and-measures-of-muscular-and-cardiorespiratory-fitness-in-colombian-schoolchildren
#11
Gavin R H Sandercock, Felipe Lobelo, Jorge E Correa-Bautista, Gustavo Tovar, Daniel Dylan Cohen, Gundi Knies, Robinson Ramírez-Vélez
OBJECTIVE: To determine the associations between socioeconomic status (SES) and physical fitness in a sample of Colombian youth. STUDY DESIGN: Prueba SER is cross-sectional survey of schoolchildren in Bogota, Colombia. Mass, stature, muscular fitness (standing long-jump, handgrip), and cardiorespiratory fitness (20-m shuttle run) were measured in 52 187 schoolchildren 14-16 years of age. Area-level SES was categorized from 1 (very low) to 4 (high) and parent-reported family income was categorized as low, middle, or high...
February 1, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28149523/differences-in-life-expectancy-between-olympic-high-jumpers-discus-throwers-marathon-and-100-meter-runners
#12
Jeffrey Lee-Heidenreich, David Lee-Heidenreich, Jonathan Myers
BACKGROUND: Several studies have demonstrated that body habitus is associated with survival (life expectancy) time. We sought to determine if survival differed between elite athletes with a range of body types. We hypothesized that the survival would differ between athlete types and that ectomorph athletes would have longer survival than heavier athletes. METHODS: For each Olympics between 1928 and 1948 we identified the top (up to 20) Olympic male and female finishers in the high jump (HJ), discus throw, marathon, and 100-m run...
2017: BMC Sports Science, Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28145700/synthetic-approach-to-determine-the-effect-of-nuclear-spin-distance-on-electronic-spin-decoherence
#13
Michael J Graham, Chung-Jui Yu, Matthew D Krzyaniak, Michael R Wasielewski, Danna E Freedman
Nuclear-electronic interactions are a fundamental phenomenon which impacts fields from magnetic resonance imaging to quantum information processing (QIP). The realization of QIP would transform diverse areas of research including accurate simulation of quantum dynamics and cryptography. One promising candidate for the smallest unit of QIP, a qubit, is electronic spin. Electronic spins in molecules offer significant advantages with regard to QIP, and for the emerging field of quantum sensing. Yet relative to other qubit candidates, they possess shorter superposition lifetimes, known as coherence times or T2, due to interactions with nuclear spins in the local environment...
February 15, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28135022/structural-overshoot-of-tree-growth-with-climate-variability-and-the-global-spectrum-of-drought-induced-forest-dieback
#14
Alistair S Jump, Paloma Ruiz-Benito, Sarah Greenwood, Craig D Allen, Thomas Kitzberger, Rod Fensham, Jordi Martínez-Vilalta, Francisco Lloret
Ongoing climate change poses significant threats to plant function and distribution. Increased temperatures and altered precipitation regimes amplify drought frequency and intensity, elevating plant stress and mortality. Large-scale forest mortality events will have far-reaching impacts on carbon and hydrological cycling, biodiversity, and ecosystem services. However, biogeographical theory and global vegetation models poorly represent recent forest die-off patterns. Furthermore, since trees are sessile and long-lived, their responses to climate extremes are substantially dependent on historical factors...
January 30, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28129370/career-performance-trajectories-in-track-and-field-jumping-events-from-youth-to-senior-success-the-importance-of-learning-and-development
#15
Gennaro Boccia, Paolo Moisè, Alberto Franceschi, Francesco Trova, Davide Panero, Antonio La Torre, Alberto Rainoldi, Federico Schena, Marco Cardinale
INTRODUCTION: The idea that early sport success can be detrimental for long-term sport performance is still under debate. Therefore, the aims of this study were to examine the career trajectories of Italian high and long jumpers to provide a better understanding of performance development in jumping events. METHODS: The official long-jump and high-jump rankings of the Italian Track and Field Federation were collected from the age of 12 to career termination, for both genders from the year 1994 to 2014...
2017: PloS One
https://www.readbyqxmd.com/read/28126142/pneumococcal-vaccination-guidance-for-post-acute-and-long-term-care-settings-recommendations-from-amda-s-infection-advisory-committee
#16
David A Nace, Laurie R Archbald-Pannone, Muhammad S Ashraf, Paul J Drinka, Elizabeth Frentzel, Swati Gaur, Dheeraj Mahajan, David R Mehr, William C Mercer, Philip D Sloane, Robin L P Jump
Efforts at preventing pneumococcal disease are a national health priority, particularly in older adults and especially in post-acute and long-term care settings The Advisory Committee on Immunization Practices recommends that all adults ≥65 years of age, as well as adults 18-64 years of age with specific risk factors, receive both the recently introduced polysaccharide-protein conjugate vaccine against 13 pneumococcal serotypes as well as the polysaccharide vaccine against 23 pneumococcal serotypes. Nursing facility licensure regulations require facilities to assess the pneumococcal vaccination status of each resident, provide education regarding pneumococcal vaccination, and administer the appropriate pneumococcal vaccine when indicated...
February 1, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28120996/long-term-aging-behaviors-in-a-model-soft-colloidal-system
#17
Qi Li, Xiaoguang Peng, Gregory B McKenna
Colloidal and molecular systems share similar behaviors near to the glass transition volume fraction or temperature. Here, aging behaviors after volume fraction up-jump (induced by performing temperature down-jumps) conditions for a PS-PNIPAM/AA soft colloidal system were investigated using light scattering (diffusing wave spectroscopy, DWS). Both aging responses and equilibrium dynamics were investigated. For the aging responses, long-term experiments (100 000 s) were performed, and both equilibrium and non-equilibrium behaviors of the system were obtained...
January 25, 2017: Soft Matter
https://www.readbyqxmd.com/read/28116880/post-exercise-recovery-of-biological-clinical-and-metabolic-variables-after-different-temperatures-and-durations-of-cold-water-immersion-a-randomized-clinical-trial
#18
Franciele M Vanderlei, Maíra C DE Albuquerque, Aline C DE Almeida, Aryane F Machado, Jayme Netto, Carlos M Pastre
BACKGROUND: Cold water immersion (CWI) is a commonly used recuperative strategy. However there is a lack of standardization of protocols considering the duration and temperature of application of the technique and the stress model. Therefore is it important to study the issue of dose response in a specific stress model. Thus the objective was to analyze and compare the effects of CWI during intense post-exercise recovery using different durations and temperatures of immersion. METHODS: 105 male individuals were divided into five groups: one control group (CG) and four recovery groups (G1: 5' at 9±1°C; G2: 5' at 14±1oC; G3: 15' at 9±1°C; G4: 15' at 14±1°C)...
January 23, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28108267/fitness-and-fatness-in-relation-with-attention-capacity-in-european-adolescents-the-helena-study
#19
Cristina Cadenas-Sanchez, Jeremy Vanhelst, Jonatan R Ruiz, Ruth Castillo-Gualda, Lars Libuda, Idoia Labayen, Pilar De Miguel-Etayo, Ascensión Marcos, Eszter Molnár, Andrés Catena, Luis A Moreno, Michael Sjöström, Frederic Gottrand, Kurt Widhalm, Francisco B Ortega
OBJECTIVES: To examine the association of health-related physical fitness components and accurate measures of fatness with attention in European adolescents. DESIGN: Cross-sectional study. METHODS: A sub-sample of 444 adolescents from the HELENA study (14.5±1.2years) from 6 different countries participated in this study. Adolescents underwent evaluations of fitness (20m shuttle run, handgrip strength, standing long jump and 4×10m shuttle run tests), fatness (body mass index, skinfold thicknesses, bioelectrical impedance, Bod Pod and dual-energy X-ray absorptiometry) and attention (d2-test)...
August 9, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28106154/anisotropic-hydrogen-diffusion-in-%C3%AE-zr-and-zircaloy-predicted-by-accelerated-kinetic-monte-carlo-simulations
#20
Yongfeng Zhang, Chao Jiang, Xianming Bai
This report presents an accelerated kinetic Monte Carlo (KMC) method to compute the diffusivity of hydrogen in hcp metals and alloys, considering both thermally activated hopping and quantum tunneling. The acceleration is achieved by replacing regular KMC jumps in trapping energy basins formed by neighboring tetrahedral interstitial sites, with analytical solutions for basin exiting time and probability. Parameterized by density functional theory (DFT) calculations, the accelerated KMC method is shown to be capable of efficiently calculating hydrogen diffusivity in α-Zr and Zircaloy, without altering the kinetics of long-range diffusion...
January 20, 2017: Scientific Reports
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